QTY = ''

itemlist = ['0003']

stuffInBox = '0003'

def func():
    if (stuffInBox in itemlist):
        func2(stuffInBox)
    else:
        pass

def func2(itemno):
    global QTY
    if itemno == "0003":
        QTY = '5'



dicta = {
    "0003": 'QTY is '+QTY+' high'
}

func()
print(dicta[stuffInBox])